A woman takes pictures of tulips at Commissioner's Park during the Canadian Tulip Festival on Sunday, May 17, 2015 in Ottawa, Ontario. (Photo by Justin Tang/The Canadian Press via AP Photo)

A woman with a hat stands amidst a filed of rape in the outskirts of Frankfurt, Germany, Thursday, May 11, 2017. (Photo by Michael Probst/AP Photo)

Construction cranes are seen behind a blossoming poppy field at outskirts of Almaty, Kazakhstan, May 14, 2015. (Photo by Shamil Zhumatov/Reuters)

A bird flies over a blossoming poppy field against the backdrop of a city and the Tien Shan mountains at outskirts of Almaty, Kazakhstan, May 14, 2015. (Photo by Shamil Zhumatov/Reuters)

On the first day of Spring a women crouches down to take a photograph of Giant Tecolote Ranunculus flowers at the Flower Fields in Carlsbad, California, U.S., March 20, 2017. (Photo by Mike Blake/Reuters)

People pick buttercup flowers in a field near Kibbutz Nir Yitzhak in southern Israel, as Gaza Strip is seen at the background April 18, 2017. (Photo by Amir Cohen/Reuters)

Laborers lay down upon a field to cut off the tulips that remained uncut by the tractor in Den Helder, Netherlands April 22, 2017. (Photo by Cris Toala Olivares/Reuters)

Elderly women wait for customers as they sell flowers in central Kiev, Ukraine April 27, 2017. (Photo by Gleb Garanich/Reuters)

A woman photographs tulips in New York, U.S., April 27, 2017. (Photo by Brendan McDermid/Reuters)

Dark rain clouds move across a field with blooming poppies near the little village of Hasenfelde, eastern Germany, Friday, June 16, 2017. (Photo by Patrick Pleul/DPA via AP Photo)

People work in tulip fields surrounding Keukenhof spring garden, in Lisse, some 20 kilometers form Amsterdam, Netherlands, Wednesday, April 19, 2017. Keukenhof has more than 7 million bulbs in bloom this spring, with a total of 800 varieties of tulips and is open from March 23 until May 21, 2017. (Photo by Peter Dejong/AP Photo)

A steam locomotive 99 1782-4 from the year 1953 pulls on a passenger train through a blooming rape field near Posewald on the island Ruegen, northern Germany, on May 19, 2017. (Photo by Jens Büttner/AFP Photo/DPA)

A bee searches for pollen among cherry blossoms on a sunny spring day in Lausanne, Switzerland March 20, 2017. (Photo by Denis Balibouse/Reuters)

Clouds hang in the blue sky over a rapeseed field not far from the small Bavarian village of Schoengeising, near Munich, during a warm sunny day on May 16, 2017. (Photo by Christof Stache/AFP Photo)

Chinese tourists make selfies in a lavender field in Valensole, southern France, on June 18, 2017. (Photo by Boris Horvat/AFP Photo)